Shareholders' Equity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Stockholders' Equity Note [Abstract]
Common stock and additional paid-in capital, beginning of period	$ 1,374
Income tax benefit of common stock options exercised	1,451
Common stock issued pursuant to stock-based compensation plans, net	938
Stock-based compensation expense	14,375
Common stock and additional paid-in capital, end of period	1,373
Stock Repurchased During Period, Value	$ 16,765